Sixth Impression. 319 pages. No dust jacket. Green cloth. Black and white photographic plates. Undated but pen inscription to front free endpaper states 1939. Black and white photographic plates. Light thumb marking, foxing and tanning to pages and plates. More prominent to text block edges, pastedowns and free endpapers. Moderate cracking to gutters but binding remains firm. Boards have minor corner bumping and edgewear with visible tanning and scuffing overall. Spine has heavier tanning with soft splitting and crushing to ends. Gilt lettering is noticeably faded and darkened. Book has a noticeable forward lean.